Plone.app.layout

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New features:


- Add a field ``webstats_head_js`` to the Site controlpanel and render its
contents in the head section using ``IHtmlHeadLinks`` viewlet manager.
See `issue 3931 <https://github.com/plone/Products.CMFPlone/issues/3931>`_:
some javascript needs to be loaded at the bottom of the page, and some in the head section.
[jladage] (3931)

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Bug fixes:


- Fix KeyError `time` when missing workflow variables are added later.
Fixes `issue 357 <https://github.com/plone/plone.app.layout/issues/357>`_.
[maurits] (357)

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Bug fixes:


- Fix nested `li` tags after zpretty in `contentviews.pt`
[petschki] (350)


Internal:


- Update configuration files.
[plone devs] (7723aeaf, cfffba8c)

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Bug fixes:


- Unify default values for translations
[erral] (347)

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Bug fixes:


- Deprecate moved `getNavigationRoot` and `getNavigationRootObject` in `plone.app.layout.navigation.root`.
This was already moved earlier as `get_navigation_root` and `get_navigation_root_object` to `plone.base.navigationroot`.
[jensens] (deprecate-navigationtroot)
- Fix transitive circular dependencies in `plone.app.layout`.
Move `.nextprevious.INextPreviousProvider` to `plone.app.dexterity.behaviors.nextprevious` and put BBB import into place.
Move the default page warning viewlet from `plone.app.dexterity.browser:default_page_warning.pt` with it's ZCML to `plone.app.layout.viewlets`.
[jensens] (fix-circular-dep-padexterity)
- Bring back all HTML attributes for actions.
[gforcada] (340)

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Bug fixes:


- Remove dead code for Archetypes relations lookup.
[jensens] (rm-archetypes-code)
- Add another unused `get_translations` method to deprecated ones.
Circula dependency on plone.app.multilingual is only for unused deprecated methods.
Move it's imports into methods-body and remove dependency from setup.py.
[jensens] (rm-dep-pamultilingual)